Greek stocks lost nearly 2 percent on Monday, falling to a 14-year low as betting company OPAP slumped more than 8 percent.
The Athens bourse?s benchmark general index gave up 1.91 percent to end at 1,330.28 points, falling below the 1,350-point technical support level.
The blue chip FTSE/ATHEX 20 index retreated 2.61 percent to 591.93 points.
OPAP tumbled 8.55 percent to 13.26 euros while OTE telecom slipped 1.57 percent to end at 6.89 euros.
Banks also suffered steep losses, dropping 2.64 percent.
National Bank slumped 2.70 percent to 4.68 euros and peer Alpha ended at 3.48 euros, off 1.69 percent.
Eurobank EFG fell 3.90 percent to 3.20 euros.
Hellenic Exchanges, which reported a 6 percent drop in first-quarter group net profit of 9.2 million euros, fell 3.38 percent to 4.86 euros.
Turnover reached 61 million euros, almost unchanged from the previous session.